Ok thanks, wonder why it's in CS livery then, because most photos I can find of it it seems to be operating charters.
In a nutshell, there were plans, but as often happens in life (and not least on the railway) plans change. The longer story:
Once upon a time...
GBRf bought Colas 3x Class 47s primarily to be used in their Rail Services division to work stock moves (including charters and railtours) - and in particular to service a Bombardier contract GB had just won. Prior to that, GB had already hired in two of them - 47739 and 47749 - from Colas to support Sleeper operations in Scotland (primarily ECS moves and the odd Class 1 working).
After the acquisition, plan was to use 47727 (which was undergoing full overhaul) on the sleeper support operations for the last year or so of the Mk3s/Mk2s whilst 739 and 749 had overhauls, repaints and mods to haul the Bombardier units. 727 would then move on to the stock moves work in due course.
However, the overhaul took somewhat longer than expected and then shortly after 727 finally arrived (belatedly) in Scotland and received its full CS adornments it suffered a fairly significant failure on a GB Charity Railtour in August 2018. As it needed some significant work, it ended up remaining at Leicester for many months to have its repairs and mods to work the Bombardier stock moves.
It only managed about c.7 miles on ECS moves to/from Polmadie with the Mk3/Mk2s after it obtained the full CS livery (it had also work the Aberdeen portion and some Carstairs portions prior to that whilst still without the logos/name). Ironically, it's worked Class 1 Sleepers in its full regalia since the Mk5s came out - piloting 73971 on 1S25/1M16 on Fri 8 Nov as noted above.
In recent weeks its mostly been used on stock moves, including 314, 317, HST, Royal Scotsman and Class 92 drags.
It is not compatible with Mk5s, so can only be used in tandem with a 73/9 as it was in November. 66s are a more favoured option to pilot 73/9s, though, as they can multi with 73/9s whereas the 47s cannot. 66s are also somewhat more reliable!